The LiftMaster 41D3484 Chain Assembly for a 7-foot door is a genuine OEM replacement part designed for LiftMaster chain-drive garage door openers. It provides the correct factory length for 7-foot residential sectional doors, helping restore smooth, reliable opening and closing when the original chain has stretched, worn, or failed. As a direct-fit LiftMaster component, it maintains proper door travel and reduces excess slack and chatter that can occur with an out-of-spec drive chain.
This replacement chain assembly is intended for compatible LiftMaster chain-drive operators configured for 7-foot door travel and is not intended for 8-foot or 10-foot applications. Installation typically involves disconnecting power, relieving tension, swapping the chain on the rail and sprocket, and then setting chain tension and rechecking travel limits per the opener’s manual. For safety, ensure the door is in the down position and secured before servicing, and follow all LiftMaster instructions to adjust limits and force after installation. Always verify compatibility by matching the opener’s parts list or service manual to part number 41D3484 when sourcing this garage door opener replacement chain.
Compatible with all LiftMaster chain drive 7' models